Firefox locking up since 142.0.x

[ArgueForSport]

Been using NoScript for many years and recommended it to all, regardless of browser. Since Firefox 142.0 was released, I've had repeated locking up of the browser tabs. By this, I mean that the tabs will simply not reload, and new tabs can be opened, but nothing loads.

Force-closing and restarting Firefox sometimes allows it to work briefly, but generally not long. I've had to disable NoScript altogether.

Running Win11 on all 3 machines. It has not affected Firefox Mobile on Android, nor Brave on the same PC's.

It's hard to say whether this is a NoScript issue or a Firefox 142.0 and higher issue. The only way to resolve it that I've found is to disable the NoScript extension, which ruins most websites for me with constant popups and other junk.

[Guest]

Does this happen also on a clean browser profile with just NoScript installed?

[ArgueForSport]

Sincere apologies for the slow reply. Naturally, immediately after posting the problem, both Brave (with NoScript) and Edge (emergency backup - without NoScript) stopped being able to access the web.

Long story short - THAT appears to have been Norton 360....at least at that time not having ANY browser work.

Now having the machine running for several hours, I could not load new pages again. Zero pages in Firefox. Not even Google.com or Amazon. It just sat there not loading. I disabled NoScript and the pages immediately loaded. And yes, those pages loaded fine earlier.

Still have a problem with NoScript without having changed any other extensions.

[barbaz]

@ArgueForSport: Just saw your edit now pretty much by happenstance. For future reference, if you report that a problem is resolved and a moderator has edited the title accordingly, and it turns out the problem was not actually resolved, it's OK to reply to your own post so that this shows up as "unread" when we look at lists of topics

Now having the machine running for several hours, I could not load new pages again. Zero pages in Firefox. Not even Google.com or Amazon. It just sat there not loading. I disabled NoScript and the pages immediately loaded. And yes, those pages loaded fine earlier.

Still have a problem with NoScript without having changed any other extensions.

Some system-wide security software is known to inject its own content into webpages and expects that injected content to respond back to it before it'll fully allow loading the webpage(s). These features use network communication to a local address and often involve active content. If NoScript blocks this, either through script blocking or its LAN block feature (or both), it could result in the symptoms you're describing. If it's blocked by NoScript's LAN access blocking feature, I believe that NoScript feature cannot work as comprehensively in Chromium-based browsers like Brave as it can in Firefox, which could explain why the issue is only impacting Firefox.

I don't know whether or not Norton 360 has a feature like this. In any case, to check whether something like this maybe what's happening to you, can you:
- Reproduce the problem on a webpage you have set to TRUSTED in NoScript, and open the NoScript popup while it's stuck, to see what site(s) are listed there?
- Open the Browser Console (Ctrl-Shift-J), make sure "XHR" and "Requests" are enabled, then reproduce the problem and see if anything is shown as "Blocked by NoScript"?
- If that does not yield useful information, try installing something like Netmon in Firefox and look at its "Global monitor"?

Also, please answer the question Guest asked above -

Does this happen also on a clean browser profile with just NoScript installed

... leaving all default settings, and keeping all other extensions disabled?

https://support.mozilla.org/en-US/kb/pr ... -user-data